Bump express-handlebars from 3.1.0 to 5.3.1 in /recommender-sys/rec-book-firebase/functions#25
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dependabot[bot] wants to merge 1 commit intomasterfrom dependabot/npm_and_yarn/recommender-sys/rec-book-firebase/functions/express-handlebars-5.3.1
+28-23
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